A hollow gear shaft hobbing positioning fixture

Abstract

This utility model belongs to the field of hollow gear shaft machining technology, and relates to a positioning fixture for hollow gear shaft hobbing. It includes a pressure plate and an adjusting assembly disposed on the pressure plate. The adjusting assembly includes multiple positioning sliders evenly spaced along the circumference and slidably connected to the pressure plate. These positioning sliders can slide towards or away from the center of the circle formed by the multiple positioning sliders under the action of a driving assembly. The driving assembly includes a telescopic sleeve that can be raised and lowered, and a connecting rod connecting the telescopic sleeve and the positioning sliders. This utility model has a simple structure and is easy to operate, realizing the positioning function of hollow gear shafts with different inner diameters. It has advantages such as high processing efficiency, high positioning accuracy, wide adaptability, and low cost.

Description

Technical Field

[0001] This utility model belongs to the field of hollow gear shaft processing technology, specifically relating to a hobbing positioning tool for hollow gear shafts. Background Technology

[0002] During gear hobbing, gear shafts are typically positioned by clamping one end with a chuck and positioning the other end with a machine tool center. However, hollow gear shafts require a plug to act on the inner hole at one end, and then the machine tool center acts on the plug. Due to the variety of inner hole sizes for hollow gear shafts, the plugs used are often unique and cannot be applied to other workpieces, resulting in wasted plug tooling and increased manufacturing costs. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by designing a hollow gear hobbing positioning fixture that is simple in structure, stable and reliable, convenient and effective, and improves processing efficiency and reduces manufacturing costs.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a hollow gear hobbing positioning fixture, including a pressure plate and an adjustment component disposed on the pressure plate. The adjustment component includes a plurality of positioning sliders that are evenly spaced along the circumferential direction and slidably connected to the pressure plate. The plurality of positioning sliders can slide towards or away from the center of the circle formed by the plurality of positioning sliders under the action of a driving component. The driving component includes a telescopic sleeve that can be raised and lowered and movable, and a connecting rod connected between the telescopic sleeve and the positioning sliders.

[0005] Preferably, the pressure plate is provided with multiple T-slots that slide and engage with the bottom T-blocks of multiple positioning sliders, the driving component is located at the center of the pressure plate, and the multiple T-slots are evenly distributed on the pressure plate along the outer periphery of the driving component.

[0006] Preferably, the telescopic sleeve has a turntable at its upper end and a sliding engagement with the outer cylinder at its lower end. The turntable has a guide rod that passes through the telescopic sleeve and is threadedly connected to the outer cylinder. A spring is also provided between the bottom surface of the telescopic sleeve and the outer cylinder.

[0007] Preferably, the telescopic sleeve and the outer cylinder are provided with an axially arranged and slidingly fitted vertical strip block and a vertical strip groove.

[0008] Preferably, a wedge-shaped washer is provided between the telescopic sleeve and the turntable.

[0009] Preferably, the outer edge of the positioning slider is designed in an arc shape that matches the inner hole of the hollow gear shaft.

[0010] Preferably, the two ends of the connecting rod are hinged to the telescopic sleeve and the positioning slider, respectively.

[0011] Preferably, the pressure plate is further provided with dimensional markings in the sliding direction of the positioning slider.

[0012] After adopting the above technical solution, the hollow gear hobbing positioning fixture provided by this utility model has the following beneficial effects:

[0013] This invention, through the design of an adjustment component, enables the formation of an adjustable-diameter positioning element on a pressure plate. The positioning element consists of multiple positioning sliders, which are controlled by a drive component to move inward or outward, allowing them to engage with hollow gear shafts of different inner diameters. This resolves the contradiction between the diversity of hollow gear shaft inner diameters and the unique positioning diameter of the plug, thus reducing manufacturing costs. The dimensional markings on the pressure plate facilitate initial adjustment of the tooling positioning diameter, improving processing efficiency. The wedge-shaped washer between the telescopic sleeve and the turntable effectively prevents turntable loosening due to vibration during processing, ensuring positioning accuracy throughout the entire process. Therefore, this invention features a simple structure, convenient operation, and achieves positioning functionality for hollow gear shafts with different inner diameters, offering advantages such as high processing efficiency, high positioning accuracy, wide adaptability, and low cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a hollow gear shaft hobbing positioning tool according to the present invention;

[0015] Figure 2 This is a cross-sectional view of the drive component in this utility model.

[0016] The components include: 1. Pressure plate; 2. Positioning slider; 3. Connecting rod; 4. Turntable; 5. Telescopic sleeve; 6. Guide rod; 7. Spring; 8. Outer cylinder; 9. Wedge washer. Detailed Implementation

[0017] The present invention will now be described in further clear and complete detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0020] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0021] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] This utility model provides a positioning fixture for hobbing hollow gear shafts, such as... Figure 1-2 As shown, the device includes a pressure plate 1 and an adjustment assembly disposed on the pressure plate 1. The adjustment assembly forms a positioning component with an adjustable diameter. Specifically, the adjustment assembly includes multiple positioning sliders 2 that are evenly spaced along the circumferential direction and slidably connected to the pressure plate 1. The outer edge of each positioning slider 2 has an arc-shaped design that matches the inner hole of the hollow gear shaft. The pressure plate 1 is provided with multiple T-shaped grooves that slidably engage with the T-shaped blocks at the bottom of the multiple positioning sliders 2. Under the action of the driving assembly, the multiple positioning sliders 2 can slide along the T-shaped grooves towards or away from the center of the circle formed by the multiple positioning sliders 2. That is, under the action of the driving assembly, the multiple positioning sliders 2 can shrink inward to reduce their diameter or expand outward to increase their diameter along the T-shaped grooves. To ensure the accuracy and efficiency of the adjustment, the pressure plate 1 is also provided with dimensional markings corresponding to the sliding direction of the positioning sliders 2.

[0024] The driving assembly is located at the center of the pressure plate 1. The multiple T-slots are evenly distributed on the pressure plate 1 along the outer periphery of the driving assembly. The driving assembly includes a telescopic sleeve 5 that can be raised and lowered, and a connecting rod 3 connecting the telescopic sleeve 5 and the positioning slider 2. Specifically, the upper end of the telescopic sleeve 5 is provided with a turntable 4, and the lower end is slidably engaged with the outer cylinder 8. The turntable 4 has a guide rod 6 that passes through the telescopic sleeve 5 and is threadedly connected to the outer cylinder 8. That is, one end of the guide rod 6 is fixedly connected to the turntable 4, and the other end extends into the interior of the telescopic sleeve 5 and is threadedly connected to the outer cylinder 8. A spring 7 is also provided between the bottom surface of the telescopic sleeve 5 and the outer cylinder 8. Furthermore, in order to ensure the stability of the telescopic sleeve 5 moving up and down along the outer cylinder 8, a vertical strip block and a vertical strip groove are provided between the telescopic sleeve 5 and the outer cylinder 8 that are axially arranged and slidably engaged. In order to ensure the stability of the positioning and avoid the problem of the turntable loosening due to processing vibration, a wedge washer 9 is provided between the telescopic sleeve 5 and the turntable 4.

[0025] When using the hollow gear hobbing positioning fixture of this utility model, the rotating turntable 4 rotates, and the guide rod 6 moves downward along the threaded hole of the outer cylinder 8. At the same time, the turntable 4 pushes the telescopic sleeve 5 downward against the force of the spring 7. At this time, the connecting rod 3 pushes the positioning slider 2 to move outward to match the hollow gear shaft with a large diameter. When it is necessary for the positioning slider 2 to move inward to match the hollow gear shaft with a small diameter, the turntable 4 is rotated in the opposite direction. The guide rod 6 drives the turntable 4 to move upward along the threaded hole of the outer cylinder 8. The turntable 4 releases the downward pushing force on the telescopic sleeve 5, and the telescopic sleeve 5 can move upward under the force of the spring 7, thereby driving the positioning slider 2 to move inward through the connecting rod 3.

[0026] In summary, the hollow gear hobbing positioning fixture provided by this utility model has a simple structure and is easy to operate. It realizes the positioning function of hollow gear shafts with different inner hole diameters, and has the advantages of high processing efficiency, high positioning accuracy, wide adaptability and low cost. It has great market value and is worth promoting and applying widely.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A positioning fixture for hobbing hollow gear shafts, characterized in that: The device includes a pressure plate (1) and an adjustment assembly disposed on the pressure plate (1). The adjustment assembly includes a plurality of positioning sliders (2) evenly spaced along the circumferential direction and slidably connected to the pressure plate (1). The plurality of positioning sliders (2) can slide towards or away from the center of the circle formed by the plurality of positioning sliders (2) under the action of the driving assembly. The driving assembly includes a telescopic sleeve (5) that can be raised and lowered and movable, and a connecting rod (3) connected between the telescopic sleeve (5) and the positioning sliders (2).

2. The hollow gear shaft hobbing positioning fixture according to claim 1, characterized in that: The pressure plate (1) is provided with multiple T-shaped grooves that slide with the bottom T-shaped blocks of multiple positioning sliders (2). The driving component is located at the center of the pressure plate (1). The multiple T-shaped grooves are evenly distributed on the pressure plate (1) along the outer periphery of the driving component.

3. The hollow gear shaft hobbing positioning fixture according to claim 1, characterized in that: The telescopic sleeve (5) has a turntable (4) at its upper end and a sliding fit with the outer cylinder (8) at its lower end. The turntable (4) has a guide rod (6) that passes through the telescopic sleeve (5) and is threadedly connected to the outer cylinder (8). A spring (7) is also provided between the bottom surface of the telescopic sleeve (5) and the outer cylinder (8).

4. The hollow gear shaft hobbing positioning fixture according to claim 3, characterized in that: The telescopic sleeve (5) and the outer cylinder (8) are provided with an axially arranged and slidingly fitted vertical strip block and a vertical strip groove.

5. A hollow gear shaft hobbing positioning fixture according to claim 3, characterized in that: A wedge-shaped washer (9) is provided between the telescopic sleeve (5) and the turntable (4).

6. The hollow gear shaft hobbing positioning fixture according to claim 1, characterized in that: The outer edge of the positioning slider (2) is designed in an arc shape to match the inner hole of the hollow gear shaft.

7. The hollow gear shaft hobbing positioning fixture according to claim 1, characterized in that: The two ends of the connecting rod (3) are respectively hinged to the telescopic sleeve (5) and the positioning slider (2).

8. The hollow gear shaft hobbing positioning fixture according to claim 1, characterized in that: The pressure plate (1) is also provided with size markings in the sliding direction of the positioning slider (2).

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